Gun sight



Search Rom June 10, 1941. M. M. JOHNSON, JR

N SIGHT Filed Aug 2 940 In. h

33. GEUIJETRICAL \NSTRUMENTTi.

Patented June 10, 1941 GUN SIGHT Melvin M. Johnson, Jr., Brookline, Mass., assignor to himself, Melvin M. Johnson, and Edward E. Rice, as trustees of Johnson Patent Trust,

Search iiccm Boston, Mass.

Application August 12,1940, Serial No. 349,720

4 Claims. (Cl. 33-54) This invention relates to a gun sight of the type having means for mounting it on the top of a rifle or other firearm and means for adjusting it to different elevations, objects of the invention being to provide a sight which can be quickly adjusted to different elevations in relatively large steps, which can then be precisely adjusted to the desired elevation by additional micrometer means, which is rugged and durable in use, which is adaptable to different conditions of visibility and which is generally superior to gun sights of the type to which the present invention relates.

For the purpose of illustration a typical embodiment of the invention is shown in the accompanying drawing in which Fig. l is a side elevation of a firearm of the Army rifle type, with the improved sight mounted on the gun;

Fig. 2 is an enlarged top plan view of a part of the gun and the rear end of the sight;

Fig. 3 is a rear view of the sight;

Fig. 4 is a section on line 4-4 of Fig. 3;

Fig. 5 is a rear view of the micrometer adjusting ring;

Fig. 6 is a section on line 6-6 of Fig. 4; and

Fig. '7 is a section on line 1-1 of Fig. 3.

The particular firearm chosen for the purpose of illustration comprises a receiver I, a stock 2, a magazine 3 and a handle 4 for manually actuating the bolt in the receiver, this gun being of the type disclosed in my prior Patents 2,094,156, 2,146,743 and 2,181,131. The particular embodiment of my new sight illustrated in the drawing comprises a leaf spring 6 mounted on the gun at its forward end by means of a dovetail connection 1, the width of the spring being increased at the rearward end to provide shoulders 8. Slidable back and forth in the space 9 between the leaf spring and the top of the firearm is a step adjuster having upstanding sides I0 provided with notches adapted to receive the depending lip II at the shoulders 8. With the adjuster in the position shown in Fig. 1 the sight rests against the top of the firearm as shown in Fig. 4 but when the adjuster is moved to the rear under the lip I I the sight is raised more or less depending upon the notches into which the lip II is engaged. The resiliency of the flexed spring not only holds the lip I I in the notches corresponding to the position of adjustment but it also locks the slide Ill against movement lengthwise of the spring.

At its rear end the spring 6 has upstanding ears I2 integrally joined to its lateral edges, the ears having depending portions [3 which extend downwardly on opposite sides of the receiver I in close juxtaposition thereto, thereby to prevent lateral movement of the rear end of the spring while permitting the aforesaid vertical adjustment. J ournaled in the ears I2 is a screw l4 having a knurled nut l5 fastened to its projecting end by means of a pin I6.

Threaded on the screw I4 is a block M which has a recess 22 slidably to receive the rear edge 23 of the spring and a fiat bottom to seat against the flat top of the firearm when the sight is in the lowermost position shown in Figs. 1 and 4. The block 2I is provided with three circular bores 24, 25 and 26, the first two extending all the way through the block and the latter extending into the block from the rear face as shown in Fig. 7. A pin 21 is fastened in the opening 25 by means of a screw 26. Fast to the forward end of the pin 21 is a disk 29 having a view opening 30 in alignment with the opening 24. Rotatably mounted on the pin 21 in the space between the block 2| and the disk 29 is a ring 3| having an annular flange 32 extending rearwardly from its periphery around the disk 29. Distributed around its axis the ring 3| has a series of sight openings 33 which, as shown in Fig. 5, are spaced from the axis of the ring at different radii which in length are intermediate the radii extending to the upper and lower edges of the view openings 24 and 30. Thus each of the sight openings 33 is visible through the view openings 24 and 30 but at different elevations. The forward ends of the openings 33 are countersunk as indicated at 34. The periphery of the ring is also provided with a notch 35 for use as a sighting notch when moved to uppermost position by rotation of the ring. The rear face of the ring is provided with radial grooves 36 to receive the nose of a plunger 31 slidably fitted in the opening 26 with a compression spring 38 for yieldingly urging the nose of the plunger into one of the grooves 36. When the ring is rotated the plunger 31 snaps into each one of the grooves 36 successively as the corresponding sight openings 33 move into alignment with the view openings 24 and 30.

In operation the slide I0 is moved backwardly to lift the block 21 to the approximate elevation desired and the ring 3| is then rotated to bring into operative position the particular sight opening 33 which affords the desired elevation. By noting the particular adjustment for a particular range, by reference to the notches in the slide I0 and the calibrations 40 on the conical surface of the ring 3|, the particular adjustment may be repeated at will. Windage adjustment may be made by rotating the nut l5 thereby threading the block 2| along the screw M, the tail ll of the block being provided with a notch 42 cooperating with calibration 43 on the rear end of the spring 6. If desired one of the sight openings 33 may be made as large as the View openings 24 and 30 for use under conditions of poor visibility. Under similar conditions the notch 35 may be used for long ranges.

From the foregoing it will be evident that this improved sight, while simple and rugged in construction, may be quickly and accurately adjusted to either approximate or accurate ranges. By extending the flange 32 from the periphery of the ring 3| rearwardly around the disk 29 the ring may be rotated with greater ease, there is less ranger of dust and dirt getting into the crack between the disk and the ring and the visibility is improved by shading the disk with the flange.

It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications and equivalents which fall within the scope of the appended claims.

I claim:

1. A gun sight comprising a wt, a pivot pin projecting rearwardly from the support, a disk fast to the pin with a space between the disk and support, a ring rotatably mounted on said pin in said space, said disk having a view opening substantially in the vertical plane of said pin and said ring having slight openings circumferentially distributed around said pin at different radial distances intermediate the limiting radii of the upper and lower edges of said view opening, and said ring having a peripheral flange extending rearwardly around said disk.

2. A gun sight sight comprising a support, a pivot pin projecting rearwardly from. the support, a disk fast to the pin with a space between the disk and support, a ring rotatably mounted on said pin in said space, said disk having a. view opening substantially in the vertical plane of said pin and said ring having sight openings circumferentially distributed around said pin at different radial distances intermediate the limiting radii of the upper and lower edges of said view opening, said ring having a peripheral flange extending rearwardly around said disk and a circumferential series of detent recesses on its forward iiace, and a spring-pressed detent mounted in said support for engagement in said recesses to hold said ring in adjusted position with one of said sight openings in line with said view opening.

3. A gun sight comprising a supporting block having three openings extending forwardly and rearwardly therein, a central opening to receive a pivot pin, an off-center view opening substantially in the vertical plane of the central opening and an off-center detent opening, a pivot pin projecting rearwardly from said central opening, a disk fast to the rear end of the pin with a space between the disk and block, a ring rotatably mounted on said pin in said space, said disk having a view opening substantially in line with said view opening and said ring having sight openings circumferentially distributed around said pin at different radial distances intermediate the limiting radii of the upper and lower edges of said view openings, said ring having a peripheral flange extending rearwardly around said disk and a circumferential series of detent recesses on its forward face, and a spring-pressed plunger in said detent recess to hold said ring in adjusted position with one of said sight openings in line with said view openmg.

4. A gun sight comprising a supporting block having three openings extending, forwardly and rearwardly therein, a central opening to receive a pivot pin, an off-center view opening substantially in the vertical plane of the central opening and an off-center detent opening, a pivot pin projecting rearwardly from said central opening, a disk fast to the rear end of the pin with a space between the disk and block, a ring rotatably mounted on said pin in said space, said disk having a view opening substantially in line with said view opening and said ring having sight openings circumferentially distributed around said pin at different radial distances intermediate the limiting radii of the upper and lower edges of said view openings, said ring having a circumferential series of detent recesses on its forward face, and a spring-pressed plunger in said detent recess to hold said ring in adjusted position with one of said sight openings in line with said view opening.

MELVIN M. JOHNSON, J R. 

